Romex to your amp?

Not true we tried this and sure it is more direct but you have no protection ,for one, or conditioning ,#2 the wire is a Garbage 
you can get much better wire from. Analysis plus awg11
sure it may cost you $$ but direct still direct to component Bad idea. For all the garbage on line even from the box log to Vh audio 
they sell excellent components,and Cryoed wire for this type of thing ,conditioning  from the circuit breaker box ,with the upgraded
wire. This is a much better method,all it takes is one big spike and 
your amp is toast,the fuse is good for mainly small internal overloads. 

Look here the Rome’s ,cryoed,and ground,
and very good condoning,surge protection.
https://www.vhaudio.com/acpowerconditioning.html

Having replaced some Supra Lorad power cable in my system just recently, I can certainly attest to the significant improvement in SQ that the new cables brought. Still, my friends question seemed to have merit, even though that last six feet of cable made a huge difference in my system. 

For the sake of any posters within the U.S. who have other dwellers in your listening perimeter, especially younger ones, I would suggest running these "ideas" past a licensed electrician before running to Home Depot.  It will be worth the $200 for the consult and that's small change for what people pay for interconnects.  The mentions of "having a pro electrician do this of course" is just simply a pro would walk away from that request.  Also misused UL Listing means this and that.  And Romex is not "brittle".  Solid copper wire is not brittle.  Neither are spoons and knives.  Romex is a brand name for NM (non-metallic sheathed) wiring rather "conductors" usually with a ground wire.  NEC code is also not a mechanism of "best practices" whether something violates the "code" or not.  The "code" is a recommendation that can be waived by jurisdiction authority.  NEC (code) is not based in how to do things, it is created and revised based upon histories of sources of fires from when fire inspectors go through and figure out the origin of the fire or issues that could cause a fire hazard.  Shock and safety and survival via exit distances and number of entrances are there as well as mostly for commercial situations, but these discussions about merits of running solid unsecured wiring in the open within dwelling areas is scary.  Solid wires are NOT brittle but as a paper clip can be broken by repeated movement so can solid electrical wire.  It could still function, but eventually could arc within the shielding and cause a fire.  Hence why all power cords are stranded cable. They are tested over time to be safe for use in situations where the wiring/power cords are being moved or bended other than installation or maintenance.  And it take more thickness of stranded cable to equal solid cable.  But solid cable does not get as affected by oxidation as stranded cable either.  Unless your circuits are protected by arc fault current interruptor breakers you may arrive home someday watching red trucks dousing your homes.  Normal breakers and even GFCI won't provide any protection.  New home built four or five years ago have these pretty much everywhere but it's still a hazard and hassle having solid wire running loosely where human traffic is involved.  I agree most discussions require no moderators at all, some of these need them desperately.  When your house burns down it doesn't matter how great your golden ears remembered how well the last "improvement" sounded.  Pretty much any of the "evidence" of what these types of changes do, or the equipment otherwise suggested is simply provided by the manufacturers of those items in the first place.  I think some of these posting are hyperbole just goading people into something unwise.

Excellent post skipskip. I think you definitively provided the reason nobody should do this and why it is a code violation. In my case I never tried hardwiring my sytem into the Romex because it is a code violation, but I didn’t know why it was one. Thanks for explaining that. Building codes exist for a reason, and that’s for the safety of homeowners and renters.

No offense to the daveyf who started this excellent thread, but I think in the light of skipskip’s post the moderators should shut down this thread before someone gets tempted to court fate and give skipskip the final word on this subject. When I first thought of hardwiring my system this way I thought it would be a clever way to bypass needing those extravagantly priced power cords. Not so clever to reduce the noise floor inexpensively and in the process create a fire hazard that threatens you and yours.

Mike